[GIT PULL] RISC-V Patches for the 5.13 Merge Window, Part 1
From: Palmer Dabbelt
Date: Thu May 06 2021 - 01:51:44 EST
The following changes since commit a38fd8748464831584a19438cbb3082b5a2dab15:
Linux 5.12-rc2 (2021-03-05 17:33:41 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git tags/riscv-for-linus-5.13-mw0
for you to fetch changes up to f54c7b5898d31eda3d6608da13b55c0466ba49fe:
RISC-V: Always define XIP_FIXUP (2021-05-01 08:53:41 -0700)
----------------------------------------------------------------
RISC-V Patches for the 5.13 Merge Window, Part 1
* Support for the memtest= kernel command-line argument.
* Support for building the kernel with FORTIFY_SOURCE.
* Support for generic clockevent broadcasts.
* Support for the buildtar build target.
* Some build system cleanups to pass more LLVM-friendly arguments.
* Support for kprobes.
* A rearranged kernel memory map, the first part of supporting sv48
systems.
* Improvements to kexec, along with support for kdump and crash kernels.
* An alternatives-based errata framework, along with support for
handling a pair of errata that manifest on some SiFive designs
(including the HiFive Unmatched).
* Support for XIP.
* A device tree for the Microchip PolarFire ICICLE SoC and associated
dev board.
Along with a bunch of cleanups. There are already a handful of fixes
on the list so there will likely be a part 2.
----------------------------------------------------------------
I had a handful of merge conflicts. One was in the documentation and I don't
think there's anything we can do about that, but two were between my trees and
those aren't really necessary. We've bumped up against this for a few cycles
now and I'm going to change up my workflow to avoid this sort of thing
happening again.
Here are my conflict resolutions, if that helps:
diff --cc Documentation/admin-guide/kernel-parameters.txt
index 20447b531630,a1266f33d6e6..5bcc229d31e2
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@@ -2794,7 -2804,24 +2804,24 @@@
seconds. Use this parameter to check at some
other rate. 0 disables periodic checking.
+ memory_hotplug.memmap_on_memory
+ [KNL,X86,ARM] Boolean flag to enable this feature.
+ Format: {on | off (default)}
+ When enabled, runtime hotplugged memory will
+ allocate its internal metadata (struct pages)
+ from the hotadded memory which will allow to
+ hotadd a lot of memory without requiring
+ additional memory to do so.
+ This feature is disabled by default because it
+ has some implication on large (e.g. GB)
+ allocations in some configurations (e.g. small
+ memory blocks).
+ The state of the flag can be read in
+ /sys/module/memory_hotplug/parameters/memmap_on_memory.
+ Note that even when enabled, there are a few cases where
+ the feature is not effective.
+
- memtest= [KNL,X86,ARM,PPC] Enable memtest
+ memtest= [KNL,X86,ARM,PPC,RISCV] Enable memtest
Format: <integer>
default : 0 <disable>
Specifies the number of memtest passes to be
diff --cc arch/riscv/Kconfig
index 6ddf5a2eb84d,6860c0c21190..a8ad8eb76120
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@@ -28,11 -27,10 +28,12 @@@ config RISC
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SET_DIRECT_MAP
select ARCH_HAS_SET_MEMORY
- select ARCH_HAS_STRICT_KERNEL_RWX if MMU
+ select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
+ select ARCH_HAS_STRICT_MODULE_RWX if MMU && !XIP_KERNEL
+ select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
+ select ARCH_SUPPORTS_HUGETLBFS if MMU
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
select ARCH_WANT_FRAME_POINTERS
select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
diff --cc arch/riscv/kernel/Makefile
index 56d5cd2a5982,647a47f5484a..d3081e4d9600
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@@ -8,11 -8,8 +8,12 @@@ CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTR
CFLAGS_REMOVE_patch.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_sbi.o = $(CC_FLAGS_FTRACE)
endif
+ CFLAGS_syscall_table.o += $(call cc-option,-Wno-override-init,)
+ifdef CONFIG_KEXEC
+AFLAGS_kexec_relocate.o := -mcmodel=medany -mno-relax
+endif
+
extra-y += head.o
extra-y += vmlinux.lds
diff --cc arch/riscv/kernel/setup.c
index 7b31779101f6,f8f15332caa2..5638f85e82f6
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@@ -148,14 -129,26 +148,15 @@@ static void __init init_resources(void
struct resource *res = NULL;
struct resource *mem_res = NULL;
size_t mem_res_sz = 0;
- int ret = 0, i = 0;
-
- code_res.start = __pa_symbol(_text);
- code_res.end = __pa_symbol(_etext) - 1;
- code_res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
-
- rodata_res.start = __pa_symbol(__start_rodata);
- rodata_res.end = __pa_symbol(__end_rodata) - 1;
- rodata_res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
-
- data_res.start = __pa_symbol(_data);
- data_res.end = __pa_symbol(_edata) - 1;
- data_res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
+ int num_resources = 0, res_idx = 0;
+ int ret = 0;
- bss_res.start = __pa_symbol(__bss_start);
- bss_res.end = __pa_symbol(__bss_stop) - 1;
- bss_res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
+ /* + 1 as memblock_alloc() might increase memblock.reserved.cnt */
+ num_resources = memblock.memory.cnt + memblock.reserved.cnt + 1;
+ res_idx = num_resources - 1;
- mem_res_sz = num_resources * sizeof(*mem_res);
+ /* + 1 as memblock_alloc() might increase memblock.reserved.cnt */
+ mem_res_sz = (memblock.memory.cnt + memblock.reserved.cnt + 1) * sizeof(*mem_res);
mem_res = memblock_alloc(mem_res_sz, SMP_CACHE_BYTES);
if (!mem_res)
panic("%s: Failed to allocate %zu bytes\n", __func__, mem_res_sz);
diff --cc arch/riscv/kernel/time.c
index 302ceafe0f81,1b432264f7ef..8217b0f67c6c
--- a/arch/riscv/kernel/time.c
+++ b/arch/riscv/kernel/time.c
@@@ -9,8 -9,9 +9,9 @@@
#include <linux/delay.h>
#include <asm/sbi.h>
#include <asm/processor.h>
+ #include <asm/timex.h>
-unsigned long riscv_timebase;
+unsigned long riscv_timebase __ro_after_init;
EXPORT_SYMBOL_GPL(riscv_timebase);
void __init time_init(void)
diff --cc arch/riscv/mm/kasan_init.c
index 4fa412a314f9,937d13ce9ab8..c3e3db5177aa
--- a/arch/riscv/mm/kasan_init.c
+++ b/arch/riscv/mm/kasan_init.c
@@@ -162,8 -159,36 +162,10 @@@ static void __init kasan_shallow_popula
{
unsigned long vaddr = (unsigned long)start & PAGE_MASK;
unsigned long vend = PAGE_ALIGN((unsigned long)end);
- unsigned long pfn;
- int index;
- void *p;
- pud_t *pud_dir, *pud_k;
- pgd_t *pgd_dir, *pgd_k;
- p4d_t *p4d_dir, *p4d_k;
-
- while (vaddr < vend) {
- index = pgd_index(vaddr);
- pfn = csr_read(CSR_SATP) & SATP_PPN;
- pgd_dir = (pgd_t *)pfn_to_virt(pfn) + index;
- pgd_k = init_mm.pgd + index;
- pgd_dir = pgd_offset_k(vaddr);
- set_pgd(pgd_dir, *pgd_k);
-
- p4d_dir = p4d_offset(pgd_dir, vaddr);
- p4d_k = p4d_offset(pgd_k, vaddr);
-
- vaddr = (vaddr + PUD_SIZE) & PUD_MASK;
- pud_dir = pud_offset(p4d_dir, vaddr);
- pud_k = pud_offset(p4d_k, vaddr);
-
- if (pud_present(*pud_dir)) {
- p = early_alloc(PAGE_SIZE, NUMA_NO_NODE);
- pud_populate(&init_mm, pud_dir, p);
- }
- vaddr += PAGE_SIZE;
- }
+
+ kasan_shallow_populate_pgd(vaddr, vend);
+
+ local_flush_tlb_all();
}
void __init kasan_init(void)
@@@ -196,12 -216,8 +198,12 @@@
break;
kasan_populate(kasan_mem_to_shadow(start), kasan_mem_to_shadow(end));
- };
+ }
+ /* Populate kernel, BPF, modules mapping */
+ kasan_populate(kasan_mem_to_shadow((const void *)MODULES_VADDR),
+ kasan_mem_to_shadow((const void *)BPF_JIT_REGION_END));
+
for (i = 0; i < PTRS_PER_PTE; i++)
set_pte(&kasan_early_shadow_pte[i],
mk_pte(virt_to_page(kasan_early_shadow_page),
----------------------------------------------------------------
Alexandre Ghiti (6):
riscv: Cleanup KASAN_VMALLOC support
riscv: Move kernel mapping outside of linear mapping
Documentation: riscv: Add documentation that describes the VM layout
riscv: Prepare ptdump for vm layout dynamic addresses
riscv: Fix 32b kernel build with CONFIG_DEBUG_VIRTUAL=y
riscv: Remove 32b kernel mapping from page table dump
Anup Patel (2):
RISC-V: Don't print SBI version for all detected extensions
RISC-V: Fix error code returned by riscv_hartid_to_cpuid()
Atish Patra (4):
RISC-V: Add Microchip PolarFire SoC kconfig option
dt-bindings: riscv: microchip: Add YAML documentation for the PolarFire SoC
RISC-V: Initial DTS for Microchip ICICLE board
RISC-V: Enable Microchip PolarFire ICICLE SoC
Carlos de Paula (1):
kbuild: buildtar: add riscv support
Guo Ren (1):
riscv: Enable generic clockevent broadcast
Jisheng Zhang (11):
samples/kprobes: Add riscv support
riscv: add __init section marker to some functions
riscv: Mark some global variables __ro_after_init
riscv: Constify sys_call_table
riscv: Constify sbi_ipi_ops
riscv: kprobes: Implement alloc_insn_page()
riscv: bpf: Move bpf_jit_alloc_exec() and bpf_jit_free_exec() to core
riscv: bpf: Avoid breaking W^X
riscv: module: Create module allocations without exec permissions
riscv: Set ARCH_HAS_STRICT_MODULE_RWX if MMU
riscv: vdso: fix and clean-up Makefile
Kefeng Wang (2):
riscv: Add support for memtest
riscv: Add ARCH_HAS_FORTIFY_SOURCE
Liao Chang (1):
riscv/kprobe: fix kernel panic when invoking sys_read traced by kprobe
Nathan Chancellor (4):
riscv: Use $(LD) instead of $(CC) to link vDSO
scripts/recordmcount.pl: Fix RISC-V regex for clang
riscv: Workaround mcount name prior to clang-13
riscv: Select HAVE_DYNAMIC_FTRACE when -fpatchable-function-entry is available
Nick Kossifidis (5):
RISC-V: Add EM_RISCV to kexec UAPI header
RISC-V: Add kexec support
RISC-V: Improve init_resources()
RISC-V: Add kdump support
RISC-V: Add crash kernel support
Palmer Dabbelt (1):
RISC-V: Always define XIP_FIXUP
Vincent Chen (5):
riscv: Add 3 SBI wrapper functions to get cpu manufacturer information
riscv: Introduce alternative mechanism to apply errata solution
riscv: sifive: Add SiFive alternative ports
riscv: sifive: Apply errata "cip-453" patch
riscv: sifive: Apply errata "cip-1200" patch
Vitaly Wool (1):
RISC-V: enable XIP
zhouchuangao (1):
riscv/mm: Use BUG_ON instead of if condition followed by BUG.
Documentation/admin-guide/kernel-parameters.txt | 2 +-
.../devicetree/bindings/riscv/microchip.yaml | 27 ++
Documentation/riscv/index.rst | 1 +
Documentation/riscv/vm-layout.rst | 63 ++++
arch/riscv/Kconfig | 90 +++++-
arch/riscv/Kconfig.erratas | 44 +++
arch/riscv/Kconfig.socs | 8 +
arch/riscv/Makefile | 9 +-
arch/riscv/boot/Makefile | 13 +
arch/riscv/boot/dts/Makefile | 1 +
arch/riscv/boot/dts/microchip/Makefile | 2 +
.../dts/microchip/microchip-mpfs-icicle-kit.dts | 72 +++++
arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi | 329 ++++++++++++++++++++
arch/riscv/boot/loader.lds.S | 3 +-
arch/riscv/configs/defconfig | 4 +
arch/riscv/errata/Makefile | 2 +
arch/riscv/errata/alternative.c | 74 +++++
arch/riscv/errata/sifive/Makefile | 2 +
arch/riscv/errata/sifive/errata.c | 106 +++++++
arch/riscv/errata/sifive/errata_cip_453.S | 38 +++
arch/riscv/include/asm/alternative-macros.h | 142 +++++++++
arch/riscv/include/asm/alternative.h | 39 +++
arch/riscv/include/asm/asm.h | 1 +
arch/riscv/include/asm/csr.h | 3 +
arch/riscv/include/asm/elf.h | 6 +
arch/riscv/include/asm/errata_list.h | 39 +++
arch/riscv/include/asm/ftrace.h | 14 +-
arch/riscv/include/asm/kexec.h | 56 ++++
arch/riscv/include/asm/page.h | 47 ++-
arch/riscv/include/asm/pgtable.h | 65 +++-
arch/riscv/include/asm/sbi.h | 3 +
arch/riscv/include/asm/sections.h | 1 +
arch/riscv/include/asm/set_memory.h | 1 +
arch/riscv/include/asm/smp.h | 4 +-
arch/riscv/include/asm/string.h | 5 +
arch/riscv/include/asm/syscall.h | 2 +-
arch/riscv/include/asm/tlbflush.h | 3 +-
arch/riscv/include/asm/vendorid_list.h | 10 +
arch/riscv/kernel/Makefile | 6 +
arch/riscv/kernel/crash_dump.c | 46 +++
arch/riscv/kernel/crash_save_regs.S | 56 ++++
arch/riscv/kernel/entry.S | 6 +-
arch/riscv/kernel/head.S | 49 ++-
arch/riscv/kernel/head.h | 3 +
arch/riscv/kernel/kexec_relocate.S | 223 ++++++++++++++
arch/riscv/kernel/machine_kexec.c | 193 ++++++++++++
arch/riscv/kernel/mcount.S | 10 +-
arch/riscv/kernel/module.c | 8 +-
arch/riscv/kernel/probes/kprobes.c | 12 +-
arch/riscv/kernel/sbi.c | 31 +-
arch/riscv/kernel/setup.c | 129 +++++---
arch/riscv/kernel/smp.c | 24 +-
arch/riscv/kernel/smpboot.c | 4 +
arch/riscv/kernel/syscall_table.c | 2 +-
arch/riscv/kernel/time.c | 2 +-
arch/riscv/kernel/traps.c | 2 +-
arch/riscv/kernel/vdso.c | 4 +-
arch/riscv/kernel/vdso/Makefile | 16 +-
arch/riscv/kernel/vmlinux-xip.lds.S | 133 ++++++++
arch/riscv/kernel/vmlinux.lds.S | 16 +-
arch/riscv/mm/fault.c | 13 +
arch/riscv/mm/init.c | 337 +++++++++++++++++++--
arch/riscv/mm/kasan_init.c | 74 ++---
arch/riscv/mm/physaddr.c | 2 +-
arch/riscv/mm/ptdump.c | 75 ++++-
arch/riscv/net/bpf_jit_comp64.c | 13 -
arch/riscv/net/bpf_jit_core.c | 14 +
include/uapi/linux/kexec.h | 1 +
samples/kprobes/kprobe_example.c | 8 +
scripts/package/buildtar | 8 +
scripts/recordmcount.pl | 2 +-
71 files changed, 2637 insertions(+), 216 deletions(-)
create mode 100644 Documentation/devicetree/bindings/riscv/microchip.yaml
create mode 100644 Documentation/riscv/vm-layout.rst
create mode 100644 arch/riscv/Kconfig.erratas
create mode 100644 arch/riscv/boot/dts/microchip/Makefile
create mode 100644 arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
create mode 100644 arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
create mode 100644 arch/riscv/errata/Makefile
create mode 100644 arch/riscv/errata/alternative.c
create mode 100644 arch/riscv/errata/sifive/Makefile
create mode 100644 arch/riscv/errata/sifive/errata.c
create mode 100644 arch/riscv/errata/sifive/errata_cip_453.S
create mode 100644 arch/riscv/include/asm/alternative-macros.h
create mode 100644 arch/riscv/include/asm/alternative.h
create mode 100644 arch/riscv/include/asm/errata_list.h
create mode 100644 arch/riscv/include/asm/kexec.h
create mode 100644 arch/riscv/include/asm/vendorid_list.h
create mode 100644 arch/riscv/kernel/crash_dump.c
create mode 100644 arch/riscv/kernel/crash_save_regs.S
create mode 100644 arch/riscv/kernel/kexec_relocate.S
create mode 100644 arch/riscv/kernel/machine_kexec.c
create mode 100644 arch/riscv/kernel/vmlinux-xip.lds.S